diff --git a/waku/v2/protocol/peer_exchange/protocol.go b/waku/v2/protocol/peer_exchange/protocol.go
index cfeaf706..fcbb5a60 100644
--- a/waku/v2/protocol/peer_exchange/protocol.go
+++ b/waku/v2/protocol/peer_exchange/protocol.go
@@ -42,7 +42,6 @@ type WakuPeerExchange struct {
 	wg            sync.WaitGroup
 	peerConnector PeerConnector
 	enrCache      *enrCache
-	enrCacheMutex sync.RWMutex
 }
 
 type PeerConnector interface {